Padlock



July 13 1926.

F. K. HEYER PADLOGK Filed Nov. 14, 1925 Patented July 13, 1926.

UNITED STATES Param OFFICE.

FREDERIC K. HEYER, 0F STANFORD, CONNECTC'UT, ASSIGNOR TO THE YALE AND TOWNE MANUFACTURING COMPANY, OF STAMFORD, CONNECTCUT.

PADLOCK.

Application led November 14, 1825..

This .invention relates to improvements in padlocks and more particularly to such as employ a shackle consisting of a single leg, one object of the invention being to provide a padlock of the type specified in which a plurality of key-controlled tumblers are employed to engagey shoulders formed onk the shackle when the shackle is passed through openings in said tumblers, the con struction being such that the shackle maybe passed freely in one direction through the tumblers but positively prevented from movement in the opposite direction except when the tumblers shall have been adjusted with the use of a proper key.

With .this and other obje-cts in view, the invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and 4pointed out in the claims.

In the accompanying drawings,-

Figure 1 is va view in elevation of my improved padlock.

Figure 2 is a view taken at right angles to Fig. 1.

Figure 3 isa sectional view with the shackle in elevation. 4

Figure 4 is an exaggerated fragmentary View showing portions of the tumblers and shackle.

Figures 5, 6, 7 and 8 are transverse sectional views.

Figures 9 and l() are views illustrating the tumblers but on a smaller scale than shown in Figures 5 and 6. A

Figure 11 is a View of one of the cheek or spacer plates.

Figure 12 .is akview illustrating the key guards. f

. Figure 13 is a sectional view through the shackle engaging portionV of a tumbler,

Figure 14 is a sectional view tl'irough the key engaging portion of a tumbler, and

Figure 15 is a view of the key 11. The casing of the lock .is preferably made in' two sections 1-1 which are secured together by means of cheek plates or spacers `2, the latter having projections 3 which pass through suitable holes in the casing members and upset as illustrated in Figure 8. plurality of cheek plates will be employed and serve the purpose of separators for a plurality of tumblers 4. The cheek plates 2 are provided near their central portions withholes 5 which align with holes 6 in the Serial No. 69,050.

a tapering portion 13. Between the head 12 and the tapering rportion 13, the shackle is provided with a plurality of circumferential grooves la which provide shoulders 15 and a portion of the wall of each of said grooves is made tapering as indicated at 16. Each tumbler l is formed near one end with an opening 17 for the passage of the shackle and said hole is so shaped as to provide a cylindrical portion 18 and a tapering portion 19. The tumblers may be divided into two sets which are normally pressed in opposite directions by means of springs 2O so that the two sets of tumblers will be moved normally in opposite directions respectively so that one set of tumblers may be made to engage shackle shoulders at one side of the shackle and the tumblers of the other set caused to engage shackle shoulders at the otherside of the shackle, ras will be clearly apparent from a comparison of Figures 5 and 6 of the drawings. The end of each tumbler farthest removed from the hole 17 through which the shackle passes, is formed with a recess 21 providing` diametrically opposite key engaging lingers or projections 9.2, each of which is beveled inwardly from the respective faces of the fingers as indicated at 23 so that the key 11 may be readily inserted or removed from the lock.` The lingers or projections 22 of the several tuniblers are so formedl or proportioned that when a proper key is passed between them,

. none .of them or any portions of said tumblers will engage shoulders of the shackle. under which conditions the shackle may be withdrawn from the lock structure.

Wlith the construction and arrangement of parts as above described, the shackle may be readily removed tovany desired extent in one direction through the lock structure but will be positively prevented from withdrawal until the holes 17 in the tumblers shall be brought into alignment with the use of a kev.

' The. shackle will be passed through the lock structure vfrom one end of the latter but Athe key will be inserted from the opposite end, for which latter purpose the casing is prrivided with -a key slot` indicated at 2a.

Guards 251 are located within the Vlock casing near the end thereof through which the key is inserted and these guards arenprovided with ngers 2G which normally close the shackle passage yand with fingers 27 which project across the key passage. The lingers Q7 or :the guards and 'the "fingers 26 are maintained normally in close proximity to each other respectively ybv means oi' springs 2r and the tingers 26 are provided with .projections 29 Ato be 4engaged vby the shackle when it is passed in one direction 4through the lock structure and to lbe separated by the shackle so that when the shackle has been passed through the lock` the guards will be ,made to assume 'the positions shown in `Ifigu're'i". It will be observed that the shaft 7 affords a pivotal mounting t'or the guards 25 as clearly indicated in Figure 7. The projections 29 on the guard fingers 26 lare intended to prevent the entrance of th'e shacklel at the key end of the padlock, and said projections have countersunk or beveled surfaces `intended to receive vthe tapering end 13 of the shackle and thus allowthe shackle to easily force the guards apart as said shackle is passed through the padlock from theend thereof opposite that into which the key is to be inserted.

Having -ully described my invention what I claim as new and desireto secure 4by Letters-Patent, is:

l. In a padlock, the combination of a casing, a plurality of tumblers pivotally mounted in said casing and having holes through which a shackle may pass, a shackle having a plurality of shoulders to be engaged vby the tumblers,'each of said tumblers having a portion of the hole therein made tapering and the shackle having tapering portions between the shoulders thereof, and springs for pressing the tumblers to locking position with the vshoulders of the shackle and said 'tumblers Ihaving key engaging means whereby said tumblers may be released ironi locking relation with the shackle when a proper key is inserted.

2. In a padlock. the combination with a casing and a shackle 'having a plurality yof shoulders, of a plurality of tuinblers pivotally mounted in thecasing and having holes through which the shackle lmay pass. springs normally tending to `move Athe tumblers into locked relation with shoulders ot the shackle, and ingers on each tumbler, each finger :having its inner side beveled from both faces 'of the linger vand the fingers of the several tumblers so arranged and proportioned that `yupon the insertion of a proper key the tumblers willbe moved so as to bring the holes through which the shackle passes into alignment `and to release the tumblers from locking relation to the shackle and permit withdrawal oit the latter.

3. In a lock, the combination of a casing having aligned openings Jfor the passage o a shackle, said casing also having a key opening, key controlled locking means for the shackle, and pivoted spring-pressed guards operable normally to obstruct the key opening and one of the shackle openings in the casing.

et. In a padlock', the combination of a ciasing having openings for the passage of a shackle, a shackle. a plurality of springpressed key-co'ntrolled means in said casing Afor locking said shackle in diii'erent positions, and spring-pressed guards normally operable to close one of the shackle openings in the casing.

5. In a pad-lock, the combination of a casing having openings tor the passage of a shackle, -a shackle, a plurality of spring- .pressed key controlled -nieansin said 'casing for locking 'said shackle in dilierent positions, and spring-pressed guards `normally operable to I'close one of the shackle openings in the casing, said shackle having a 'tapering end portion for cooperation with said guards vl'to Aopen lthem when ythe shackle is passed through the casing.

6. In a padlock, the combination of a casi-ng having aligned openings for the passage of a shackle, said casing also 'having a key opening, a shackle. a plurality of spring-pressed, key controlled locking tumblers cooperable with ,said shackle, and spring-pressed guards operable to close one of `-the vshackle openings and vhaving parts normally obstructing the key opening.-

7. In a lock, the combination of a casing #having ali'gned openings for the passage of a shackle and having a key hole at one end, =key controlled 2locking means Jfor the shackle, and guard means normally `closing the shackle opening at the key-hole end of the casing. whereby insertion of ,the shackle at this end of the casing will be prevented.

8. AIn a lock` the combination of a casing having aligned openings 'for the passage of a shackle andjhaving a -key hole at one end, lkey controlled `locking means for the shackle,and guard means normally closing the shackle `opening at the key-hole end of the casing, whereby insertion oit :the shackle at this end ot the casing will be prevented, said guard means being beveled for engagement of the shackle to move the guard means aside when the shackle fis passed through the ycasing `from the end vthereof opposite the end having the key-hole.

9. In a lock, the combina-tion of a casing 'having aligned openings for the passage of a shackle and having a key hole at one end, `ke'ycont-rolled locking means Vfor the shackle, and gi'iard -means normally closing the shackle opening at the key-hole end of the casing, whereby insertion of the shackle at this end of the casing will be prevented, said guard means comprising two pivoted me1nhers, each having a projection preventing insertion of the shackle at the keyhole end of the casing, the inner portions of said projections presenting beveled surfaces to be engageol by the shackle when inserted from the opposite end of the casing. n

In testimony whereof, I have signed this specification.

FREDERIC K. HEYER. 

